MOVIE-world insiders say a big-screen version of the beloved NBC sitcom “Friends” would bomb big-time, even if the once-hot cast is itching to do it.

Amazed by “Sex and the City,” which has grossed more than $300 million in theaters so far, Jennifer Aniston, Matthew Perry, Courteney Cox, Matt LeBlanc, Lisa Kudrow and David Schwimmer are ready to reprise their TV roles, a source told London’s Daily Mail this week.

But Erik Davis of Cinematical.com writes: “I couldn’t care less what Rachel, Monica, Phoebe, Joey, Chandler and Ross are up to now . . . And how weird would it look to actually have the cast of ‘Friends’ out amongst real people in a real city, and not on the same four sets?”

Davis goes on to say that while a Thanksgiving TV special would be fine, “when you take away the laugh track and place these characters in a very real environment, are people going to buy it?”

MTV Movie Blog is also skeptical: “Does anybody really care? . . . Sure, ‘Sex and the City’ made the transition . . . but [it] had certain elements that made it especially well-suited for the big screen – glamorous fashions, outrageous story lines and an insanely devoted following of moviegoing fans.”

The Daily Mail’s source claimed that Aniston, 39, had been dragging her heels on the project but is now set to move ahead: “She says she and Courteney have already talked this summer . . . and if deals can be made with them, everything else can fall into place rather quickly.”

Aniston’s rep insisted to Page Six, “We are not aware of any such project. I really don’t know [if she would have any interest].” Schwimmer’s flack said, “There’s been no discussion about it.” But if there is a movie, it would surely bring the cast monster paychecks, and maybe give their flagging careers a boost.